package demo2;

public class KeyBoard implements IUSB{

    public void openDevice() {
        System.out.println("打开键盘服务....");
    }

    public void input() {
        System.out.println("键盘输入数据.....");
    }

    public void closeDevice() {
        System.out.println("关闭键盘服务....");
    }
}
